diff --git a/forms/HiddenField.php b/forms/HiddenField.php
index 12495f202..831c5573c 100644
--- a/forms/HiddenField.php
+++ b/forms/HiddenField.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * Hidden field.
  *
@@ -6,25 +7,42 @@
  * @subpackage fields-dataless
  */
 class HiddenField extends FormField {
-
+	/**
+	 * @param array $properties
+	 *
+	 * @return string
+	 */
 	public function FieldHolder($properties = array()) {
 		return $this->Field($properties);
 	}
 
+	/**
+	 * @return static
+	 */
 	public function performReadonlyTransformation() {
 		$clone = clone $this;
+
 		$clone->setReadonly(true);
+
 		return $clone;
 	}
 
+	/**
+	 * @return bool
+	 */
 	public function IsHidden() {
 		return true;
 	}
 
+	/**
+	 * {@inheritdoc}
+	 */
 	public function getAttributes() {
 		return array_merge(
 			parent::getAttributes(),
-			array('type' => 'hidden')
+			array(
+				'type' => 'hidden',
+			)
 		);
 	}
 }